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Rev counter & fuel gauge not working, but temp is.

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I have an odd problem. The temp gauge works fine, but the revs and fuel don't.

The stabiliser is reading 10V.

I have run the additional 12V switched, 10V stabilised, and ground cables from the guide.

Any connection between revs and fuel? I'm assuming it can't be 10V as temp is on that rail

Whip
/wip/
Noun - Car

When the steering wheel was first put into use in automobiles, it was called the whip. The term has now been generalised to classify any automobile.

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Check your 10V supply to the Tach and the fuel gauge, as well as the ground source of your cluster. You may be surprised to find out that you have a broken or iffy trace to them

I have had in the past where the 10V stabilizer was flakey internally and it caused my gauges to be off by 100 rpm, and the fuel and water gauge to be off by 1/4 scale deflection. Got a old fashioned "O-Scope" out of mothballs and watched real time that occasionally the 10v stabilizers ground occasionally went to 12V. So I de-duced that internally the 10V stabilizer was having issues…

The area where the 10V stabilizer was plugged in on one of my rides was iffy, so I soldered a wire to my 10V stabilizer to the B+ in from battery, and Ground. (I used male female connectors to apply it outside of the connector, and then ran a wire from my 10V stabilized pin to the water temp gauge, and presto by backfeeding the supply to the proper areas, all my iffyness to the gauges disappeared, and my gauges started to work flawlessly.


What do Divorces, Great Coffee, and Car Electrics all have in common?

They all start with GOOD Grounds.

Where are my DIY Links?

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Briano1234 said

The area where the 10V stabilizer was plugged in on one of my rides was iffy, so I soldered a wire to my 10V stabilizer to the B+ in from battery, and Ground. (I used male female connectors to apply it outside of the connector, and then ran a wire from my 10V stabilized pin to the water temp gauge, and presto by backfeeding the supply to the proper areas, all my iffyness to the gauges disappeared, and my gauges started to work flawlessly.

Yep, I followed your guide and have done the same.

Briano1234 said

Check your 10V supply to the Tach and the fuel gauge, as well as the ground source of your cluster. You may be surprised to find out that you have a broken or iffy trace to them

Interestedly, while doing these checks I disconnected the extra 12V that goes to the stabiliser, and the temp gauge stopped working. So the main 12V must be disconnected.

I'll take it out of the car and investigate further…

Whip
/wip/
Noun - Car

When the steering wheel was first put into use in automobiles, it was called the whip. The term has now been generalised to classify any automobile.
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